The answer appears to be that they did exactly NONE of those things, they never intended to do ANYTHING even if the building held out for a week, and so never issued ANY orders to respond. It also appears that every senior officer in the region who tried to get any sort of response up was fired right afterward.
Panetta's already gone and so really untouchable. Dempsey should be relieved and retired for gross dereliction. He won't be, of course, because he is loyal to the regime much more than he is to his oath, his service, or his honor.